miag2001 miag2001

26-05-2016
Mathematics

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If m varies directly with x 2 , and m = 10 when x = −4, find the value of m when x = 3

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alex3245 alex3245

29-05-2016

If it is directly proportional, then:

m = kx
10 = k x -4
k = -2.5

m = 3 x -2.5
m= 7.5

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